CVE-2009-2692
A public proof of concept exists; no exploitation attested.
- Published2009-08-14
- Fixed in2.6.30.5 · 2.4.37.5
- WeaknessCWE-908
Am I affected?
Debian, Ubuntu or Red Hat sometimes backport a fix without changing the upstream version number: such a version reads « to verify », never « affected ».With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.
Description
The Linux kernel 2.6.0 through 2.6.30.4, and 2.4.4 through 2.4.37.4, does not initialize all function pointers for socket operations in proto_ops structures, which allows local users to trigger a NULL pointer dereference and gain privileges by using mmap to map page zero, placing arbitrary code on this page, and then invoking an unavailable operation, as demonstrated by the sendpage operation (sock_sendpage function) on a PF_PPPOX socket.
Timeline
dates in UTC- 2009-08-1415:16CVE publishedNVD
- 2026-10-2319:23First public proof of conceptPoC-in-GitHub
- 2026-10-2319:23EPSS crossed 10 %FIRST EPSS
Observed activity
isMalicious corpus · updated 2026-10-23 21:37 UTCBlock these indicators
- Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2009-2692?format=txt
- CSV export: https://api.ismalicious.com/edl/cve/CVE-2009-2692?format=csv
- TAXII collection of exploited CVEs
- The EDL and CSV take an API key on the Pro plan.
Versions per branch
NVD| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 2.6 | ≥ 2.6.0, < 2.6.30.5 | 2.6.30.5 | NVD |
| 2.4 | ≥ 2.4.4, < 2.4.37.5 | 2.4.37.5 | NVD |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 4.0 | = 4.0 | no fix published | NVD |
| 5.0 | = 5.0 | no fix published | NVD |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 4.8 | = 4.8 | no fix published | NVD |
| 5.3 | = 5.3 | no fix published | NVD |
5 more products in the sources.
as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.
Fix
- Update Linux linux kernel to 2.6.30.5 · 2.4.37.5
Advisories and patches
- secunia.comVendor Advisory
- secunia.comVendor Advisory
- secunia.comVendor Advisory
- secunia.comVendor Advisory
- secunia.comVendor Advisory
- secunia.comVendor Advisory
Detection
read 2026-10-23 19:23 UTC- Nuclei template
- none so far ProjectDiscovery
- Exploit-DB
- no entry Exploit-DB
Sources
- NVDCVSS 3.17.8read 2026-10-23
- NVDCVSS 2.07.2read 2026-10-23
- NVDweakness (CWE)CWE-908read 2026-10-23
- FIRST EPSSEPSS score14.6 %read 2026-10-23
- PoC-in-GitHubproof of concept1read 2026-10-23
Technical details
- CVSS v3 Vector
- CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Published
- 2009-08-14
- Last Modified
- 2026-06-16
- NVD status
- Modified
Frequently asked questions
What is CVE-2009-2692?
Is CVE-2009-2692 actively exploited?
What is the CVSS score for CVE-2009-2692?
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